His statement was a bit ambiguous but I assume his point was that while 120k is quite good, much of that was damage that didn't need to be dealt. Fire mages are seeing in the high 90ks single target; how much of your damage comes from Ice lance and nether tempest (and frozen orb) cleave?
Not to mention now there are fire mages with 15-20k more dps than yours, which is not surprising of course. Dont get the wrong idea, we're not trying to diminish your performance, we're just saying that the point remains that fire is significantly higher on every fight. I expect in the coming weeks for fire mages to RNG even higher than the current top logs